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authorXufeng Zhang <xufeng.zhang@windriver.com>2013-11-25 11:26:57 +0800
committerDavid S. Miller <davem@davemloft.net>2013-11-28 18:29:58 -0500
commit6eabca54d6781f61c7318517c1463a098acb7a87 (patch)
treeb546ca46b835a418c3e80d55c3fdcb86dade25b3 /net/sctp/output.c
parent5e53e689b737526308db2b5c9f56e9d0371a1676 (diff)
downloadop-kernel-dev-6eabca54d6781f61c7318517c1463a098acb7a87.zip
op-kernel-dev-6eabca54d6781f61c7318517c1463a098acb7a87.tar.gz
sctp: Restore 'resent' bit to avoid retransmitted chunks for RTT measurements
Currently retransmitted DATA chunks could also be used for RTT measurements since there are no flag to identify whether the transmitted DATA chunk is a new one or a retransmitted one. This problem is introduced by commit ae19c5486 ("sctp: remove 'resent' bit from the chunk") which inappropriately removed the 'resent' bit completely, instead of doing this, we should set the resent bit only for the retransmitted DATA chunks. Signed-off-by: Xufeng Zhang <xufeng.zhang@windriver.com> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/output.c')
-rw-r--r--net/sctp/output.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/sctp/output.c b/net/sctp/output.c
index e650978..0e2644d 100644
--- a/net/sctp/output.c
+++ b/net/sctp/output.c
@@ -474,10 +474,11 @@ int sctp_packet_transmit(struct sctp_packet *packet)
* for a given destination transport address.
*/
- if (!tp->rto_pending) {
+ if (!chunk->resent && !tp->rto_pending) {
chunk->rtt_in_progress = 1;
tp->rto_pending = 1;
}
+
has_data = 1;
}
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